forloopcheck

int yPos = 300;

int yspe = 2; 

int xPos = 300;

int xspe = 10;

​

void setup(){

  size(500,500);

  frameRate(100);

  smooth();

  noStroke();

}

void draw(){

  fill(44, 255, 243, 10); 

  rect(0, 0, 500, 500);

  fill(44,232,255);

  for(int i = 0; i < 20; i ++){

    rect(0 + 60 * (i+1), yPos, 40, 40);

    rect(xPos, 0 + 60 * (i+1), 40, 40);

  }

  moveRects(5);  

}

​

void moveRects(int speed){

  if(yPos == 0 || yPos == 490){

    yspe = yspe*(-1); 

  }

  yPos = yPos + speed * yspe; 

  if(xPos == 100 || xPos == 490){

    xspe = xspe*(-1);

  }

  xPos = xPos + speed * yspe;

}

​